The ornamental design for a flexible, multiple chamber storage container for medical use, as shown and described.
FIG. 1 is a front view of the flexible, multiple chamber storage container for medical use with three discrete chambers;
FIG. 2 is a rear view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a left side view thereof; and,
FIG. 6 is a right side view thereof.
The handle for the container shown in broken lines at the top of FIGS. 1 and 2, and the opening to receive a dispensing port shown in broken lines at the bottom of FIGS. 1 and 2 and in FIG. 4 form no part of the claimed design.